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Mexico
United States
HIV Infections
Acquired Immunodeficiency Syndrome
Sexually Transmitted Diseases
Intravenous Substance Abuse
Prostitution
Risk-Taking
Sexual Behavior
Unsafe Sex
Condoms
Prevalence
Risk Factors
Cross-Sectional Studies
Urban Population
Transients and Migrants
Young Adult
Population Surveillance
Seroepidemiologic Studies
HIV Seropositivity
Co-Publications
30
20
17
12
10
8
7
5
4
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